Walk into any pharmacy or market stall, from Accra to Manila, and you will find shelves packed with creams that promise everything from smoother skin to a lighter complexion. Some of these products are backed by decades of clinical research. Others are built almost entirely on marketing and inherited belief, and a few are genuinely dangerous.
This article looks at the main categories of skin cream in daily use around the world, moisturizers, sunscreens, retinoids, corticosteroids, and skin lightening products, and separates documented science from popular myth. The aim is to give a balanced, international picture, since these products are used and debated across households in Africa, Asia, and beyond, often for different reasons and under different regulations.
Moisturizers: the most basic and best proven category
Moisturizers work by supporting the skin barrier, the outermost layer of skin that keeps water in and irritants out. This barrier depends heavily on lipids called ceramides, which make up around half of the fat content of that outer layer [1]. When ceramide levels drop, whether from ageing, harsh weather, frequent washing, or conditions like eczema, the skin loses water faster and becomes more vulnerable to irritation.
Clinical research backs this mechanism directly. A study published in the Journal of Drugs in Dermatology found that a skincare routine combining a ceramide-containing moisturizer and sunscreen protected the skin barrier from ultraviolet damage, improving hydration and reducing redness and dark patches after sun exposure compared with untreated skin [1, 2]. A separate trial in the Journal of Cosmetic Dermatology found that four weeks of daily use of a ceramide-containing sunscreen increased the moisture content of the skin’s outer layer by nearly 22 percent and reduced both redness and water loss through the skin [3]. Ceramide-based moisturizers have also shown clinical benefit in managing eczema, reducing flare severity and improving how patients rate their own skin health [1].
This evidence applies broadly, regardless of skin tone or climate. Dry, dusty, or heavily air-conditioned environments common across many African and Asian cities can all accelerate water loss from skin, which is exactly the mechanism a good moisturizer is designed to slow down.
Sunscreen: one of the best studied creams in dermatology
Sunscreen is arguably the single most rigorously tested skin cream category, thanks to a long-running randomized controlled trial conducted in Nambour, Australia. Starting in 1992, over 1,600 adults were randomly assigned to either daily broad-spectrum sunscreen use or discretionary use, and followed for years afterward [4, 5].
The results were significant. Participants who used sunscreen daily showed measurably slower skin ageing after four and a half years compared with those who used it only occasionally [4, 6]. When researchers followed the same group for ten years after the trial ended, those who had been in the daily sunscreen group had less than half the rate of new melanoma diagnoses compared with the discretionary group, and the reduction in invasive melanoma specifically was substantial [5]. This is one of the few skincare claims with long-term, randomized, controlled human trial evidence rather than laboratory or short-term data.
This matters everywhere the sun is strong, not just in countries typically associated with sunscreen marketing. Ultraviolet damage accumulates in all skin tones, including deeply pigmented skin, even though visible sunburn is less obvious. Melanin offers some natural protection but does not eliminate the risk of UV-related skin damage or skin cancer [4].
Retinoids: strong evidence for wrinkles and skin renewal, with an important nuance
Retinoids are vitamin A derivatives, and they are among the most studied anti-ageing ingredients in dermatology. Tretinoin, the original prescription retinoid, was first developed as an acne treatment before researchers noticed it also faded sun damage spots, evened out skin tone, and sped up the turnover of skin cells [7].
Retinoids work primarily by increasing collagen production and reducing the enzymes that break collagen down, while also encouraging new blood vessel growth in the skin, which improves skin colour and texture [7, 8]. A systematic review of randomized, controlled, double-blind trials involving 237 adults found that retinol and its derivatives produced significant improvements in fine wrinkles, elasticity, and skin texture, even at low concentrations, over four to twenty-four weeks of continuous use [9]. A separate randomized trial in elderly adults, whose average age was 87, found that topical retinol measurably increased key skin matrix proteins and improved fine wrinkling compared with a plain moisturizer over 24 weeks [10, 11].
It is worth being clear about what this evidence shows and does not show. Results typically take three to six months to become visible, and the best results take six to twelve months of consistent use [7]. There is also an important, more skeptical point some researchers raise: because these improvements fade once a person stops using retinoids, some argue this shows retinoids are managing the visible signs of ageing rather than genuinely slowing the underlying ageing process itself [12]. This is a reasonable scientific distinction rather than a reason to dismiss retinoids, since visibly healthier, more collagen-rich skin is still a real and measurable benefit, even if it does not amount to reversing biological age.
Topical corticosteroids: effective medicine that requires real caution
Steroid creams, ranging from mild hydrocortisone to very strong prescription-only formulations, are genuinely effective treatments for eczema, psoriasis, and other inflammatory skin conditions, and have been used safely by millions of people for around 70 years [13]. The concern is not whether they work, but how they are used.
A growing body of recent research has focused on a condition called topical steroid withdrawal, sometimes referred to as red skin syndrome, which can occur after stopping medium to high potency steroid creams that were used continuously for a prolonged period, generally more than three months [14, 15]. Symptoms include burning, intense itching, redness, and skin that peels or cracks, most commonly on the face [14, 16]. A 2025 review in Frontiers in Allergy examined the biological mechanisms behind this condition in detail, and a separate 2025 study published in the Journal of Investigative Dermatology identified a specific disruption in cellular energy processing in the skin of affected patients, offering one of the first concrete biological explanations for the syndrome [15, 17].
Regulators have responded to this evidence. In the United Kingdom, the National Eczema Society and the Medicines and Healthcare products Regulatory Agency issued updated guidance, and as of June 2025, all topical steroid medicines sold in the UK must state their strength category on the label, specifically whether they are mild, moderate, strong, or very strong [16, 18]. This change followed direct public advocacy over confusion about steroid strength.
There is also a well-documented problem in parts of Africa and Asia with prescription-strength steroid creams being sold without a prescription, sometimes mixed into skin lightening products. A study in India highlighted ongoing regulatory difficulties around uncontrolled steroid sales and their contribution to steroid-damaged, dependent facial skin [19, 20]. The safe use principle that comes out of this research is straightforward: topical steroids remain a legitimate and effective medicine, but higher potency versions are meant for short, supervised courses rather than continuous long-term daily use, and stopping should generally be gradual rather than abrupt when a strong steroid has been used for a long time [16].
Skin lightening creams: where the most serious documented harm sits
Skin lightening, sometimes called skin bleaching or toning, is a major global market, and this is also the category with the clearest and most recent evidence of real physical harm.
Mercury
Mercury has long been used in some skin lightening products because it interferes with the enzyme tyrosinase, which the skin needs to produce melanin, the pigment responsible for skin colour [21]. The problem is that mercury absorbed through repeated skin application accumulates in the body and is a well-documented neurotoxin. In June 2026, the United States Food and Drug Administration issued a fresh consumer warning after laboratory testing found high levels of mercury and hydroquinone in a range of over-the-counter skin lightening products sold under names including Deluxe Silken Bleaching Cream, Jhalak Hand and Foot Beauty Cream, Orbi 20 Whitening Cream, and Dr. Yanhee Cream Set products [22, 23]. The FDA lists documented health risks including kidney damage, tremors, numbness, headaches, fatigue, and mood or cognitive disturbances, and stresses that these risks extend to family members exposed to mercury vapour or contaminated towels in the same household, with pregnant women, nursing infants, and young children considered especially vulnerable [22, 24].
This is not a problem confined to any single region. Testing in New York City found some skin lightening creams and soaps containing mercury at levels as high as 27,000 times the permissible limit [25]. Separately, a hospital-based case control study conducted at the University of Nigeria Teaching Hospital between September and December 2025 found a documented association between the use of skin lightening and certain herbal cosmetic products and chronic kidney disease among the adults studied [26]. This is one of the more recent pieces of direct clinical evidence linking these products to organ damage in an African clinical population specifically, though it should be read as one case control study rather than final proof for every product on the market, since not all skin lightening creams contain mercury.
Hydroquinone
Hydroquinone is a skin lightening ingredient that works by directly inhibiting melanin production, and in some countries it is available in low concentrations under medical supervision for specific pigmentation disorders. However, in the United States, hydroquinone is not approved in any over-the-counter product, and the FDA has documented reports of skin rashes, facial swelling, and a condition called ochronosis, a bluish black skin discolouration that can be permanent, linked to its use in unregulated products [24, 27]. Even after the US over-the-counter hydroquinone ban, a study surveying stores across the Twin Cities in Minnesota found hydroquinone and prescription strength steroids still being sold in skin lightening products without a prescription [20].
What has actually been measured versus what is assumed
It is worth being precise here rather than treating every skin toning cream as equally dangerous, because the underlying research shows real variation between products and regions. A laboratory study of 62 skin lightening creams and soaps sold in Ghana measured mercury and hydroquinone levels in every sample and found that, in this particular set of products, the concentrations were below the FDA’s acceptable safety limits and did not appear to pose a measurable health risk to users based on that testing [28]. This is a genuinely useful, methodologically sound finding, but it should not be generalised into a blanket claim that skin lightening creams anywhere are automatically safe, since product formulations, regulation, and enforcement vary enormously by manufacturer and by country, and other testing in the same broad category has found extremely high contamination in different products [22, 25]. The responsible reading of this body of evidence is that mercury and hydroquinone contamination is a documented, serious, and unevenly distributed risk that depends heavily on the specific product and where it was manufactured and sold, not a fixed property of every skin lightening cream everywhere.
Myths and claims not supported by solid evidence
“Skin needs to breathe, so heavy creams suffocate it”
This is a common belief used to argue against thicker moisturizers or petroleum-based products. Skin does not take in oxygen through its surface in a way that a topical cream could meaningfully block, since skin respiration in humans happens through the bloodstream, not by absorbing air directly through the outer layer. There is no clinical research showing that occlusive moisturizers cause oxygen deprivation to skin cells. What differs between formulations is how likely they are to trap oil and debris in pores in people prone to acne, which is a separate issue from “suffocating” the skin.
“Natural or herbal skin creams are automatically safer than manufactured ones”
Being labelled natural or herbal does not by itself indicate safety or effectiveness, since natural products are not automatically free of active, potentially harmful compounds, and they are not automatically held to the same testing standards as approved pharmaceutical ingredients. The Nigerian case control study mentioned above specifically linked certain herbal cosmetic products, not only mercury-containing ones, to kidney disease risk in the population studied [26]. Natural ingredients can absolutely have real benefits, but that has to be demonstrated product by product through testing, not assumed from the word natural on a label.
“More expensive creams always work better”
There is no consistent scientific pattern showing that price correlates with clinical effectiveness. What actually matters, based on the research summarised in this article, is the concentration and quality of active ingredients such as ceramides, retinoids, or sunscreen filters, and how consistently a product is used. A correctly formulated, lower cost moisturizer with ceramides can outperform an expensive product that lacks a well-studied active ingredient.
“You only need sunscreen on sunny days or at the beach”
Ultraviolet radiation reaches the skin on cloudy days and through most daily outdoor exposure, not only during obvious sun and heat. The Nambour trial that produced the strongest sunscreen evidence involved ordinary daily life exposure over years, not occasional beach trips, which is part of why the daily use group showed a measurable reduction in skin ageing and melanoma risk compared with the discretionary use group [4, 5].
A practical way to think about skin creams
The research reviewed here points to a fairly consistent pattern. Products designed to support or restore the skin’s natural barrier, moisturizers with ceramides and daily sunscreen, have strong, repeatable clinical evidence behind them and are broadly safe for long-term daily use across skin tones and climates [1, 3, 4]. Retinoids have solid evidence for improving the visible signs of ageing, but require patience and consistent, correctly guided use [9, 10]. Topical steroids are legitimate medicine that becomes risky mainly through unsupervised or prolonged high potency use rather than appropriate short-term treatment [14, 16]. Skin lightening products sit in the highest risk category, not because lightening skin is inherently impossible to do safely, but because a documented share of the products on the market, tested repeatedly across different countries, contain mercury or unapproved hydroquinone levels linked to kidney damage, neurological symptoms, and permanent skin discolouration [22, 25, 26].
Given how differently regulation and enforcement work from one country to another, checking whether a product has been tested by a recognised regulatory body, and being cautious of products promising rapid, dramatic skin lightening, is a reasonable precaution regardless of where you live.
This article is for general information and does not replace personalised medical or dermatological advice. If you have a specific skin condition, are considering stopping a long-term steroid cream, or are worried about a product you are already using, it is worth speaking with a doctor or dermatologist directly. If you spot anything in this article that needs correcting or updating, please reach out to us with feedback.
[1] Ceramides help prevent and treat dermatological conditions, Pharmacy Times
[2] CeraVe research highlights the impact of UV exposure on the skin barrier and the benefits of ceramides, Practical Dermatology
[3] Efficacy of ceramide-containing sunscreen on skin barrier, MIMS Idea
[4] Sunscreen and prevention of skin aging: a randomized trial, Annals of Internal Medicine, via QxMD
[5] Reduced melanoma after regular sunscreen use: randomized trial follow-up, University of Manchester Research
[6] Daily sunscreen slowed skin aging in middle aged adults, MDedge
[7] Do retinoids really reduce wrinkles?, Harvard Health Publishing
[8] Topical retinoids and skin aging mechanisms, Journal of Drugs in Dermatology
[9] Efficacy and safety of cosmetic products containing retinol or derivatives, University of Algarve Repository
[10] Topical retinol bolsters elderly skin and reduces wrinkles, Patient Care Online
[11] Topical retinol improves fine wrinkles associated with natural aging, JAMA Dermatology
[12] Retinoids probably don’t slow skin aging, Nintil
[13] Topical Steroid Withdrawal (TSW), National Eczema Society
[14] Topical Steroid Withdrawal (Red Skin Syndrome), StatPearls, NCBI Bookshelf
[15] Breaking the cycle: a comprehensive exploration of topical steroid addiction and withdrawal, Frontiers in Allergy
[16] Topical Steroid Withdrawal (TSW), National Eczema Society
[17] Topical Steroid Withdrawal: Uncovering Neuroinflammatory Mechanisms, Dermatology Times
[18] Reviewing the Evidence Base for Topical Steroid Withdrawal Syndrome, PMC
[19] Sales, status, prescriptions and regulatory problems with topical steroids in India, Indian Journal of Dermatology, Venereology and Leprology, via PubMed
[20] Prescription Ingredients in Skin Lightening Products Found Over the Counter Post Hydroquinone Ban, PMC
[21] Mercury in Skin Lightening Creams: A Comprehensive Review of Health Risks, Analytical Detection Methods, and Regulatory Legislations, ResearchGate
[22] FDA finds high levels of mercury and hydroquinone in skin lightening products, WFTV
[23] Skin Lightening and Brightening Creams: What Is Actually In Them, Black Health
[24] FDA Warns Consumers of Skin Products Containing Mercury and/or Hydroquinone, US Food and Drug Administration
[25] Beauty Justice: Health Risks of Toxic Skin Lighteners, WE ACT for Environmental Justice
[26] Mercury in Skin Lightening Creams: A Comprehensive Review of Health Risks, Analytical Detection Methods, and Regulatory Legislations, ResearchGate
[27] Mercury Poisoning Linked to Skin Products, US Food and Drug Administration
[28] Mercury and hydroquinone content of skin toning creams and cosmetic soaps, and the potential risks to the health of Ghanaian women, PMC
